president obama turns to a former top clinton aide for some help. can he put the second term agenda back on track? >>> handshake uproar. an impromptu greeting with cuba's raul castro sparking controversy and speculation. is it an omen for u.s. relations with cuba? >>> and dying wish. a young cancer victim inspires a bipartisan bill to increase funding for research. why do some democrats say it's a fraud? i'm wolf blitzer. you're in "the situation room."